Remove more dead code after Object.observe removal

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 16123 matching lines @@
                       "  sum=ee_op_test_count_func(sum);"
                       "}"
                       "sum;");
   CHECK_EQ(16000000, result->Int32Value(context).FromJust());
 
   result = CompileRun("ext_array[3] = 33;"
                       "delete ext_array[3];"
                       "ext_array[3];");
   CHECK_EQ(33, result->Int32Value(context).FromJust());
 
-  result = CompileRun("ext_array[0] = 10; ext_array[1] = 11;"
-                      "ext_array[2] = 12; ext_array[3] = 13;"
-                      "ext_array.__defineGetter__('2',"
-                      "function() { return 120; });"
-                      "ext_array[2];");
+  result = CompileRun(
+      "ext_array[0] = 10; ext_array[1] = 11;"
+      "ext_array[2] = 12; ext_array[3] = 13;"
+      "try { ext_array.__defineGetter__('2',"
+      "function() { return 120; }); } catch(e) {};"
+      "ext_array[2];");
   CHECK_EQ(12, result->Int32Value(context).FromJust());
 
   result = CompileRun("var js_array = new Array(40);"
                       "js_array[0] = 77;"
                       "js_array;");
   CHECK_EQ(77, v8::Object::Cast(*result)
                    ->Get(context, v8_str("0"))
                    .ToLocalChecked()
                    ->Int32Value(context)
                    .FromJust());
@@ skipping 8861 matching lines @@
 }
 
 TEST(PrivateForApiIsNumber) {
   LocalContext context;
   v8::Isolate* isolate = CcTest::isolate();
   v8::HandleScope scope(isolate);
 
   // Shouldn't crash.
   v8::Private::ForApi(isolate, v8_str("42"));
 }